Apparatus for cinematographic projections



- 1,634,597 Ju y 1927- E. c. SOLA APPARATUS ro'n cmnu'roemrnzc' PROJECTIONS rum Dec. 24, 1924 2 sheets-sheet 1 1,634,597 July 1927' E. c.'soLA APPARA TUS 1 011 CIKEI ATOGRAPHIC PROJECTIONS Ooooo'ooooOo Patented July 5, i921. UNITED STATES hummus roa cmu' aroenamc snows-nous Application fled December a, 1824,8eria1 no. 751,944, and in Spain January u, use.

by its simplicity in operation and the few-' ness of its parts which enables the apparatus to be constructed at low cost. Moreover, by means of this apparatus,

clear, steady and very distinct images are projected upon the screen, use being made of members for changing the images of the film with great rapidit at the same time as the light is-shut ofi cm the filni for a very brief period, the value of whichis equal to the intermediate. obturation or eclipse of each image, the said obturations or eclipses" obtained in this manner-haying an equal value to the periods durin which the'light passes, a condition which hi hly favours the obtaining of clear and distmct'projections.

The apparatus proper is characterized by,

the feature that it is arranged in such a manner thatthefilm-receives the light indirectly, that is to say that the lantern in which is laced the source or origin of the.

illumination, is not an integral part of the said apparatus but in this case 1s arranged separately from the latter and so as to direct the beam of the rays of light which it throws out on to a mirror arranged for this purpose which deflects and directs the rays towards the objective ofthe projecting apparatus. Together with this device the said a paratus provides important 'safeguar mg means, so that if any accident occurs to thelantern it will in no case affect the film or anypa'rt of the projecting apparatus.

oreover, the shutter of the apparatus proper. is double and is arranged so' that when the a paratus is not in motion itremains close opening automatically. as. soon. as the apparatus commences to work. In

this manner, if for any reason the project'- ing' apparatus ceases to hem motion, the continuous'action of the rays of light upon the same part of the film, which would set fire to the latter, is prevented. I One practical form of construction of the apparatus acco to the, invention is illustrated by wayo example, in'the accompapying drawings in which 1 igure 1 ice side view of paratus 2 iea-fmntview of the same apthe entire ap Figures 3 and show to a largescale the shutter with the device fol-automatically over-provided at its upper part with an ex- I tension 8, on which is-iDOunted thegate 9 and the projecting objective 9', which may be adjustable and of any class, type or arrangement.

Mounted upon the frame roper 1 are the axles 10 and 11, upon the t of which is mounted so as to. form an integral part thereof, member 12 having a curved camj like surface which when it rotates draws the film 7, asthe latter issues from the gate 9 the said member by pulling upon the film, causes the latter: to move intermittently. The said.cam-like member which rotates at a constant angular velocity is made. with a profile so as to give to the film during each intermittent actuation rogressive and umformly accelerated an decelerated move ments, thereby preventing any pronounced or 'erky action.

glpon the axle proper is also mounted the shutter 13, the pulley 14, over which passes the belt 15, which .is driven by; an electric motor 16, and a toothed pinion 1 7 which enggges with awheel 18 mounted upon the a e 11 so-as to form an integral (part of the latter. Upon this axle 'is mounte the cylinder or 'sprocket 19 which guides the film by. means of-its corresponding-jockey rollers 19', and the pulley 20for transmitting motion to the spindle ofthe spool or reel 6, upon which the film is wound after it has mg through the gate 9 and over the cylinn the end of the mile proper 11 is pro- -vid an operat' handle 21for the urposeof actuating e apparatus by ban in .case of necessity.

amirror 22p from a source of illumination placed wi the lantern 23, im to re 'bemg' dev varied without the objective 9'. The shutter 13 is integrall mounted upon its shaft 10 and at .a suita le distance from it is mounted freely upon the same shaft a second shutter 24 (see also Figures 3 and 4) of the same size as the shutter 13 and connected to the latter by means of a spring 25 in such a manner that when the shutter 13 is stationary its apertures are always covered by-the second shutter 24. The latter is provided with radial wings or projections 26 and when the first shutter is put in motion, the action of the air upon the said wings of the shutter 24 imparts a backward movement tothe'latter, this movement being limited by astop 27 provided for the purpose, when the apertures of the two shutters coincide. In the same way, when the shutter 13 sto s the spring 25 acts upon the shutter 24.- an automatically brings it back to its original position.

The sizes and shapes of the various parts or members which constitute the apparatus, as well as the materials from which the said members are constructed, and also the general construction of the ap aratus may be going outside the scope of the invention.

What I claim is An apparatus for cinematographic proportingjection, comprisin a frame, su members thereon For supporting t e spindles of the-film spools, the projecting gate and the objective, an axle mounted on the said frame, a motor for driving the said axle, a shutter mounted on the said axle in an integral manner, a second axle, a device mounted on the first axle for transmitting sive uniformly accelerated and decelerated movements during each intermittent actuation, a member integrally mountedon the second axle driven by the first axle, a member inte for drivmg the spool ufiaon which the film is being wound, a sproc et upon the second axle for guiding the film, which sprocket is provided with the corresponding jockey rollers.

In testimony whereof I have signed my name to this specification.

ammo CARRANZA soLA.

lly mounted on the second axle 

